Machine for cutting rubber rings.



w. P. MCGEOUGH.'

' Y MACHINE FGRGUTTING RUBBER RINGS.

- 4 SHEETS-SHEET 1.

I 1l. will Flfllx en.. 'mimi'. n. r.

l Patented Fem, 1911.

` W. P. MGGBOUCH. MAGHINB FOB CUTTING RUBBER RINGS n Prummel rum Nov. 2a, 1910.

Patented Feb?, 1911.

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il aus :una ag 'naman'. n c.

w. P. MOGBOUGH.

MACHINE FOR CUTTING RUBBER RINGS. ,Y

LPPLIOATIOX FILED FOV. 28, 1910. v

Patented Feb.7,1`911.

4 SHEETS-SHEET 3.

v M11/asses i w. P. MGGBOUGH.

MACHINE POB CUTTING RUBBER RINGS.

APPLICATION FILED BOY. 28, 1910.

Patented Feb?, 1911.

-4 SHEETS-SHEET 4.

@zu d@ l 'l l i. i v:

. GnoUoii, a citizen of the United States, residing in Somerville, county of Middlesex,

WILLIAM r. MeGEoUcH, or soMnnvILLE, nurssaonusairfrs.

A MACHINE FOR CUTTING RUBBER- RINGS.

Specication'of Letter Patent.

Patented Feb. '7, 1911.

Application tiled November 28, 1910. Serial No. 594,445.

.To all 'whom may concern:

Be it known that I, VILLIAM I. MC-

and State of Massachusetts, have invented lan Improvement inMachines for Cutting Rubber Rings, of which the following desimultaneously operated by a common ac.

script-ion, in connection with the accompanying drawings7 is a specification, like letters on the drawings representing like parts.

This invention relates to a machine for cutting individual rings from a tube or sleeve of rubber or like yielding material, and is an Aimprovement upon the machine shown anddescribed in United States Patent- No. 9etS,LO1 granted to me February S, 1910. The present invention has for itsobject to increase the production of machines of the class referred to, and for this purpose I employ a plurality of knives or cutters which are mounted on a single carriage and are tuating device, whereby a plurality of rings may be cut simultaneously from a sleeve or tube of rubber or other yielding material.

The invention further has for its object to improve and simplify machines of the class referred to.

These and other features of this inven tion'will be pointed out in the claims at the end of this specilication.

Figure 1 is a. front elevation, and Fig. 2, an end elevation of a machine embodying this invention. Fig. 3, a rear side elevation. F ig. 4, an enlarged section'taken on the irregular line 1fi, Fig. 3. Fig. 5, an elevation of the knife carrying lever. Fig. G, a

side elevation of the same. -Fig. 7, an

elevation of the carriage for the knife lever. Figs. S and 9, details of the knife carrying arms. Fig. 10, a detail of the split nut. F ig. 11, a plan of the machine shown in Fig. 1. Fig. 12,l an underside view of the carriage. Fig. 13, a detail of the carriage on an enlarged scale. Figs. 14 and 15, enlarged details in section to be referred to, and Fig. 1G, a detail to be referred to.

Referring to the drawing a represents a mandrel upon which is placed a tube or sleeve b of rubber or other yielding material, which it is desired to out up int-o rings. The mandrel a is centered between the two parts c, d, of a main shaft, which is revolved at a substantially high speed by means of a belt (not shown), but which is passed about the vpulley een the part c of the main shaft, said part having bearings in a frame f erected upon the bed g4, of the machine, and the part Z being supported by an upright It erected upon the bed at its opposite end, said bed having suitable legs rlhe part Z of the shaft is movable longitudinally toward and from the part c to enable the mandrel a to be placed into operative relation to the shaft, so as to revolve therewith and to be replaced when the tube Z) has been cutup into rings.

The part cl maybe moved longitudinally by means of a lever lO'and may be secured in its forward or operative position by a clamping lever 12, in a manner well understood. i

In accordance -with this invention, the mandrel a, has cooperating with it a plurality of cutters or knives, preferably circular disks having circumferential cutting edges. In the present instance, I have shown two circular disk knives or cutters 13, 14, loosely mounted upon shafts or arbors l5, 16, supported by the forked ends of levers or arms 17, 1S, provided as herein shown with split hubs 1Q, 20, (see Figs. 3, 8 and 9), which are adjustably secured as by the screws 2l on a stationary pin or shaft 28 extended through a hub 24 on a lever 25 (see Figs. 3 and 5). AThe lever 25 is provided at its lower end with-a cross bar 26 having hubs 27, which carry pivot screws 28, which enter suitable sockets in the opposite sides of a depending arm 30 secured to or forming part of a carriage 3l, which is mounted to slide on ways 32 on the side bars 33 of the bed r/ of the machine. The lever 25 is provided with an arm 3st carrying astud or roll 35, which enters a cam groove or path 36 in one face or side of a disk 37, splined on a shaft 3S to rotate therewith and to move longitudinally thereon, the-said shaft, which will hereinafter be referred to as the cam shaft, being driven from the man'. shaft by a pinion 40 on the latter meshing with a large gear il on the cam shaft, whereby the latter shaft is caused to rotate at a materially slower speed than the main shaft. The cam path 36 is shaped so as to move both knives 13, 14, into engagement with the sleeve or tube b on the mandrel, and cause the said knives to simultaneously cut two rings from the said sleeve or tube, and to then move the knives backward and outJ of engagement with the tube or sleeve Z; and to hold said knives in their inoperative position, while the carriage is fed lengthwise e t t s l. l ,t

I of the mandrel a distance-substantiallyequal to thethickness of a ring. The carriaged is i'ed torward'bv a screw-shaft lh-,whim is interniittentb` rotated as-will he described,

5 and to which the carriage is clamped or clutched b v a split 'nut 14, shown separatel)y in Fig. 10,` which is adapted to be engaged with the screw-thread ot' theshaft 13 by a Vcam disk 4G (sec'ligs. 12, 1l and 15) pro-v vided with cam slots 4T, into which extend studs or projections #18 on the two halves of the split nut` 1+i, so that when the cam disk turned in one direction, the two halves of ,the nut are engaged with the lscrew shaft. 43, and when turned in the opposite direction are disengaged therefrom. The two Afhalves of the split nut- J1J: a're vertically arranged, and the cam disk 1G is horizontally arranged and is fast toa vertically arranged shaft 5t), which is extended down through thel bottom of the carriage The shaft 50 below the carriage 33 has loose on it a handle which is designed to be turned bythe operator in thc direction ot the arrow o3, Fig. 1). when it is desired to clamp the carriage to the screw-shaft 13. The handle 52 is moved in the opposite direction vinto its starting -position by the spring 5l.

Provision is made for locking or holding 30. the cam disk 46 in its operative position, and for this purpose, I employ a lever 55, which Vis pivotcd atto the underside of the carriage and is provided with-a tooth 5T, which is adapted to enter a notch or recess 5S, in the peiipheiwv of a collar 5t) fast on the shaft 50 and provided with a pin 155, which is engaged by the lever 52 to turn the collar. 59. The tooth 5T is held in the notch f or recess 5S by a spring 60 (see Fig. 11) connected with the level' 55, which is ar- 'anged with relation to the collar 59 so as to extend substantiallyat right angles to the path Vof movement of the carriage when i said lever isin locking engagement with the collar 59. The locking lever in its operative position shown in Figs. 4 and 1l cooperates with a pin or projection (31 (see Fig. 3) on the underside of the bed near one end thereof, and is designed to engage the same at or about the time the carriage has reached the end of its movement in its forward direction, indicated bythe arrow 100 in Figs. land 3, so that further movement of thecarriage will carry the recessed collar "D 59 away from the locking lever and disen gage said collar from the tooth 57, whereupon the springs (33. G4, attached atone end to arms 65, 66, extended from the collar 59 and.` at their other ends to the carriage, act to turn the shaft 5t) and the cam disk 46, so as to open the split nut; and release the carriage from its operating shaft- 43.

The screw-shaft 43 Vis rotated intermittently so as to effect a step by step feed of the carriageafterthe ringshave been eutand the knives have been withdrawn from Vthe rublurslecve or tube For this pun pose, the screw-shaft lil has faston it `a ratchet wheel T0 (see Fig. 9) with which cooperate a plurality of pawls T1 pivoted to a tianged disk T2 loosely mounted on the shaft 4?. said disk being connected by the rod T23 to block it mounted to slide on anariu 75 of a lever To, mounted to turn on a stud i? ttached to the frame of the machine, said lever having its short arm TSYjanued to a rod T9. which is forked at its upper end to straddle the shaft 3o, and is provided with a stud or roller S0, which enters a cam groove S1 in one face or side of a disk Si). fast on the shaft .By reference to Fig. 2. it will beseensthat rotation of the cam disk reeiproeates the rod T9. which oseil-` lares the lever TG and through the block T4 and link or rod T3 oscillates the pawl carrying disk TQ. the latter on its movement in one direction, indicated b v the arrow 90 causing the pawls to turn the ratchety wheel and its screw shaft H13, a sntlicient distance to feed the carriage forward a distance substantially equal to the thickness of a ring. On the backward movement. of the pawl-carrying disk (2. the pawls click by the teeth of the ratchet wheel TO without. movingr the latter or its shaftl 43, znse# quently the said shaft and the carriage for the knives remain stationary while the rings are being cut.. The feed of the carriage may he varied by adjusting the block Tt on the lever arm T5. The block Tl niayhe secured in its adjusted position b v the set screw In operation. the carriage 31 is moved into its starting position o v the operator turning the hand wheel 9-L mounted on the shaft 95 having a pinion 9G. which meshes with a i ick bar 97 attached to the bed of the ma chine. Then the. carriage has been thus placed, the knives 13. 14, are adjusted with relation to the tube or sleeve L. which is effected b v turning the arms or levers 17. 1S, on their pivot rod Q3. and when the knives are properly positioned the said arms or levers are rendered fast on the pivot rod 23 b v the screws 21. The handle is then turned to engage the stud or pin 155 on the collar 55) and the shaft 50 and move the latter into the position shown in Fig. 11 so as to bring the notch 5S into engagement with the tooth 5T md thus clutch the carriage to the feed shaft 43. As soon as the notch 5S in the collar 59 is engaged with the tooth 5T, the handle 52 is released b v the 'operator and is returned to its starting position by the spring 54. The machine is then started in operation in a manner well understood. and at each rotation of the cam shaft, the lever is movedtoward and from the mandrel. Cn the movement of the lever toward the mandrel, the knives or cuttingr disks en- Vgage the tube or sleeve and cutl through the Asame so as to form two rings simultaneously, Vafter which the knives are withdrawn from engagement with the tuhe or sleeve and are maintained in this latter position by the cam 3G, while the. carriage is being 4fed forward the distance substantially equal tothe thickness of a ring. At. or near the end of the forward feed of the carriage in the direction indicated b v the arrow in Fig. 3, the lever 55 strikes the stop pin (3,1 and releases the carriage from the feed shaft 43, after which the carriage can be returned to its starting position b v hand as above described.

It will he observed that the lcvers or arms` 17, 1S, carrying the knives arceach capable of being turned back mi the. pivot rod 23 by vmerely loosening the set screws 21, which enables either knife to he adjusted. replaced or sharpened without `interfering with thel operation of the other.

Irovision is made for stopping rotation Y of the feed shaft 43 to prevent overfeeding of the carriage, and for this purpose, I employ a brake comprising an arm or lever 12() (see Fig. 3), which engages a collar 121 fast on the screw shaft 43. The brake arm 120 is forced into engagement with the col- ,the proper lar l121 by a cam 122 fast on the shaft 38 and acting on the upper end of the brake arm. The cam 122 is suitably shaped to vapply the brake at eachI revolution of the shaft 3S when the carriage has been fed forward distance. Provision also made for taking the power ot'f of the machine at. or about the time the carriage has reached the end of its forward travel, and for this purpose, I have provided a rod 125 which is mounted to slide in suitable bearings 126, 12T on the bed of the machine (see :the arrow 100. Fig. 1.

Fig. 1) and which is arranged to be engaged by the carriage 33 on the forward movement of the latter in the direction of The rod 125 abuts against a vertically arranged rod 130, which is operativelyy connected with' a shipper. not shown, for thebclt not shown, which drives an overhead shaft, not shown, to which the 'pulley e is belted. The vertically arranged shipper rod 130 is elevated to ship the main belt, not shown, and is supported in this po-` sition by the bearlng 12T (see Figs. 1 and `16), in which position it is retained by a spring 131 until dislodged therefrom by the carriage 33 engaging the rod 125 and movarms carrying said knives, a lever pivoted to said carriage and on which said arms are mounted'to turn, means to secure said arms iu tixed relation to said lever, and a cam cooperating with said lever to move the sanie toward the mandrel, .substantially as described. v

2. A'In a machine of the character described, in combination, a tube supporting mandrel, andl a carriage, one of 'said parts being movable longitudinally with relation to the other, means for intermittently feeding said movable part, a plurality of knives, arms carrying said knives, a lever to which said arms are adjustably secured, and a cam to move said lever on its pivot toward said mandrel, substantially7 as described.

3. In a machine of the character described. in combination, a. tube supporting mandrel, and a carriage, one of said parts being movable longitudinally with relation to the other, means for intermittently feeding said movable part. a plurality of knives, supports for said knives capable of being moved toward and from said mandrel simultaneously and independent of each other, and means for moving said supports toward said mandrel to bring the knives into engagementwith said tube, substantialhY as described.

4. In a machine of the character described, in combination, a tube supporting mandrel, and a carriage, one of said parts being movable longitudinally with relation to the other, vmeans for intermittently feeding said movable part, a plurality of knives capable of being moved independently of each other toward and from said mandrel, and means for simultaneously moving said knives toward said mandrel, substantially as described.

5. In a machine of the character described, in combination, a movable knife carriage, a screw shaft. means for connecting said carriage to said shaft, a ratchet wheel fast on said shaft, a pawl copcrating with said ratchet wheel, a carrier for said pawl loosely mounted on saidscrcw-shaft, a pivoted lever having one arm connected with said pawl carrier, a reciprocating rod connected with the other arm of said lever, and a rotatable shaft provided with a cam for reciprocating said rod, substantially as described.

G. In a machine of the class described, in combination, a movable knife carriage, a screw-shaft, a split nut mounted on said shaft, a substantially horizontal disk having cam slots, pins on said split nut extended into said slots, a. vertically arranged shaft carrying said cam disk and extended through the bottom lof said carriage, a lever located below said carriage and mounted on said vertically arranged shaft to turn the same, a collar on said shaft provided with i l l l l u notch in its periphery, a locking lever pro- Vvided with u projectlon cooperating with Suid notch, a spring to maintain said projection m engagementwith said notch, und a f spring to turn the collar attached-to said shaft, when the Suid projection is disengaged Yfrom rSuid notch, lsubstantially :1s described.

`calm for movinr said knife toward said mandrel, u shaft on which said cam is mouned,

:i screw shaft, means for connecting said curi-inge with Suid screw Shaft', a brake co- 154 operatingr with said Screw Shaft, and a cum4 copcraling with said bluke'to applyihe same, substantially as; described.

In testimony whereof, I have signed my name to this specification in the presence of 20 two subscribing Witnesses.

IVILLIAM I), MCGEOUCI-I. 'vitnusses:

IVAL'ri-:n XV. NEWTON, JAS. J. CLIFFORD. 

